Q-switching of waveguide lasers based on graphene/WS2 van der Waals heterostructure

Ziqi Li; Chen Cheng; Ningning Dong; Carolina Romero; Qingming Lu; Jun Wang; Javier Rodríguez Vázquez de Aldana; Yang Tan; Feng Chen

doi:doi:10.1364/PRJ.5.000406

Photonics Research, 2017, 5 (5): 05000406, Published Online: Aug. 15, 2017

Q-switching of waveguide lasers based on graphene/WS2 van der Waals heterostructure Download： 1010次

Ziqi Li ¹Chen Cheng ¹Ningning Dong ²Carolina Romero ³Qingming Lu ⁴Jun Wang ² Javier Rodríguez Vázquez de Aldana ³Yang Tan ¹Feng Chen ^1,*

Author Affiliations

¹ School of Physics, State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China

² Key Laboratory of Materials for High-Power Laser, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China

³ Laser Microprocessing Group, Facultad Ciencias, Universidad de Salamanca, Salamanca 37008, Spain

⁴ School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China

Figures & Tables

Fig. 1. (a) Schematic of graphene/WS2 heterostructure on sapphire substrate. (b) Raman spectrum of the WS2 sample. (c) Raman spectra of monolayer graphene. (d) PL spectrum measured from graphene/WS2 heterostructure, WS2, and graphene excited by 532 nm solid-state laser at room temperature. (e) Typical open-aperture Z-scan curves with normalized transmission as a function of sample position Z.

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Fig. 2. Schematic of the experimental setup for Q-switched waveguide laser. Inset is an optical photograph of the graphene/WS2 heterostructure on sapphire substrate.

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Fig. 3. Efficient Q-switched Nd:YVO4 waveguide laser emission. (a) Emission spectrum of Q-switched waveguide laser modulated by graphene/WS2 heterostructure. Insert is the pulse trains of Q-switched pulsed laser. (b) Output power versus the launched power. Inset is the evolution of measured near-field modal profile of the graphene/WS2-based pulsed laser as the increase of launched power.

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Fig. 4. Comparison of the parameters of pulsed laser Q-switched by SAs of graphene/WS heterostructure, WS2, and graphene. (a) Repetition rate and pulse duration as a function of launched power. (b) Pulse energy and peak power as a function of launched power.

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Ziqi Li, Chen Cheng, Ningning Dong, Carolina Romero, Qingming Lu, Jun Wang, Javier Rodríguez Vázquez de Aldana, Yang Tan, Feng Chen. Q-switching of waveguide lasers based on graphene/WS2 van der Waals heterostructure[J]. Photonics Research, 2017, 5(5): 05000406.

Q-switching of waveguide lasers based on graphene/WS2 van der Waals heterostructure Download： 1010次

Fig. 2. Schematic of the experimental setup for Q-switched waveguide laser. Inset is an optical photograph of the graphene/WS2 heterostructure on sapphire substrate.

Fig. 4. Comparison of the parameters of pulsed laser Q-switched by SAs of graphene/WS heterostructure, WS2, and graphene. (a) Repetition rate and pulse duration as a function of launched power. (b) Pulse energy and peak power as a function of launched power.

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Q-switching of waveguide lasers based on graphene/WS2 van der Waals heterostructure Download： 1010次

Fig. 2. Schematic of the experimental setup for Q-switched waveguide laser. Inset is an optical photograph of the graphene/WS2 heterostructure on sapphire substrate.

Fig. 4. Comparison of the parameters of pulsed laser Q-switched by SAs of graphene/WS heterostructure, WS2, and graphene. (a) Repetition rate and pulse duration as a function of launched power. (b) Pulse energy and peak power as a function of launched power.

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